COLOR CODED Blue : Tranquility, hope, freshness, cold, sadness; blue can often be a reassuring, fresh color but could also give a sense of loneliness. Red : Passion, blood, danger, urgency; red is a very dominant color so even a small amount can be powerful, and it is used to warn us. Yellow : Happiness, joy, richness; yellow is also a dominant color. Green : Life, health, nature, purity; green can be a very fresh color when used to capture landscapes and other nature pictures. Gray : Sadness, neutrality. ...